The Therm-a-Rest Trail Pro Sleeping Pad is the warmest and most comfortable backpacking mattress ever. Our latest diagonal-cut foams slow heat loss though the mattress, boosting warmth, and we also applied pressure-mapping technology to ensure an ideal pattern of support and cushioning, right where you need it. Together they allow the Trail Pro mattress to be light enough for the trail, decadent enough for car camping and versatile enough for everything in between.